Exporting High-Strength Structural Adhesive Film to Japan: CSCL, GHS-SDS, and Customs Documentation Guide

Korean exporters shipping high-strength structural adhesive film to Japan face three distinct compliance layers: Japan's Chemical Substances Control Law (CSCL) for chemical substance obligations, the Industrial Safety and Health Law (ISHL) mandating a Japanese-language Safety Data Sheet, and standard customs clearance documentation including a certificate of origin to claim RCEP preferential tariff benefits. Because a finished adhesive film is a cured solid article — not a raw chemical substance — CSCL notification obligations typically rest with the Japanese importer, not the Korean exporter. This guide walks through each compliance layer step by step, from your Korean factory to Japan customs clearance.

Understanding CSCL: The Article Exemption for Finished Adhesive Film

Japan's Chemical Substances Control Law (CSCL), known as Kashinho, governs the import of chemical substances into Japan. For Korean exporters of finished adhesive film, the most important regulatory distinction is between a finished article and a raw chemical substance.

Per CIRS Group, finished articles such as cured adhesive films are explicitly exempt from CSCL new substance notification requirements. Notification is only triggered when constituent chemical substances or new polymers are not already listed on Japan's Existing and New Chemical Substances (ENCS) inventory. The finished film itself does not trigger the obligation. This means that for most shipments of high-strength structural adhesive film, your Japanese importer does not need to file a CSCL notification before importation.

There is a key structural reality to understand: under CSCL, only Japan-registered manufacturers or importers can file compliance notifications, annual reports, or exemption applications with METI, per ChemSafetyPro. The legal compliance burden rests entirely with the Japanese importer. Your role as the Korean exporter is to provide the importer with accurate information about your adhesive formulation so they can assess their obligations.

2024 procedure update: Per CIRS Group, Japan updated CSCL import clearance procedures effective July 1, 2024. Documentation requirements at customs now vary by substance category. Class I specified chemical substances require an import permit copy; new chemical substances not on the ENCS inventory require METI pre-notification at least three months before first importation; general substances with assigned ENCS serial numbers need no special import documentation. Work with your Japanese importer and a CSCL compliance specialist to confirm which category applies to your specific adhesive formulation.

One ongoing importer obligation to note: if the Japanese importer handles volumes exceeding 1 metric ton per year of any CSCL-covered substance, they must submit annual volume reports to METI during the April 1 to June 30 reporting window, per ChemSafetyPro. This is your importer's compliance task — coordinate early to avoid last-minute surprises.

Japanese-Language SDS — An Exporter Deliverable

Japan's Industrial Safety and Health Law (ISHL), administered by the Ministry of Health, Labour and Welfare (MHLW), requires that Safety Data Sheets for GHS-classified hazardous chemicals supplied in Japan be written in Japanese. Per 3E Company, the SDS format must comply with JIS Z 7253:2019, which specifies 16 standard sections aligned with the UN Globally Harmonized System of Classification and Labelling of Chemicals.

This is a Korean exporter action item. Unlike CSCL, where the compliance obligation rests with the Japanese importer, the SDS is a document that the Korean manufacturer or exporter is expected to prepare and deliver. Your Japanese buyer will ask for a Japanese-language SDS before or alongside the first shipment. An English-language SDS does not satisfy ISHL requirements.

ISHL scope is also expanding. Per UL Solutions, 649 additional substances were added to ISHL SDS requirements effective April 1, 2025 (with a grace period until March 31, 2026), and 779 more substances will be added effective April 1, 2026 (grace period until March 31, 2027). If your adhesive formulation contains modified epoxy or polyimide components that fall within these newly covered categories, prepare or update a Japanese-language SDS before the applicable deadline.

Practical step: Engage a Japanese regulatory translation and compliance specialist to prepare a JIS Z 7253:2019-compliant, 16-section SDS for your adhesive film. Allow 2–4 weeks for this process, especially for initial translations. Do not wait for your Japanese buyer to make a formal request — begin SDS preparation as part of your pre-shipment documentation planning.

J-MOSS Electronics Compliance — EU RoHS Does Not Transfer

If your high-strength structural adhesive film is used in electrical or electronic equipment — including automotive electronics, printed circuit board assemblies, or industrial control components — Japan's J-MOSS standard (JIS C 0950) applies.

Per RoHS Guide, J-MOSS restricts six hazardous substances: Lead (Pb) ≤0.1%, Mercury (Hg) ≤0.1%, Cadmium (Cd) ≤0.01%, Hexavalent Chromium (Cr6+) ≤0.1%, Polybrominated Biphenyls (PBB) ≤0.1%, and Polybrominated Diphenyl Ethers (PBDE) ≤0.1%. Products exceeding these limits must carry an orange hazardous substance mark on the product, packaging, and catalog.

EU RoHS compliance does not automatically satisfy J-MOSS. These are separate legal frameworks. Japanese buyers in automotive and electronics sectors will ask for J-MOSS-specific documentation — an EU RoHS certificate alone is not sufficient. If your Korean manufacturer holds test data covering all six restricted substances at the specified limits, a J-MOSS self-declaration supported by those test results is generally accepted by Japanese buyers. Confirm the exact documentation format with your buyer before the first shipment.

A note on performance testing: your product specifications reference ASTM D1876 for T-peel strength (≥15 N/25mm). Japanese industrial buyers typically reference JIS Z 0237:2022 as the domestic adhesive tape performance standard, per ADMET Inc. Including JIS-referenced test data alongside ASTM data in your technical data sheet reduces the back-and-forth during a Japanese buyer's technical review.

Step-by-Step Japan Customs Clearance Document Package

Japan's import clearance procedure follows five sequential steps, per Japan Customs (Ministry of Finance). The process begins when your goods enter a Hozei (bonded) zone at a Japanese port and ends with the issuance of an import permit.

The document package for a high-strength adhesive film shipment must include: a detailed commercial invoice (HS code 3926.90, product composition, dimensions, unit price, and country of origin); a packing list with gross and net weights in kilograms per container (Japan's Measurement Law requires metric units throughout); a bill of lading or air waybill; Import Declaration Form C-5020, filed by a licensed Japanese customs broker; and a certificate of origin if the importer is claiming RCEP preferential tariff treatment.

Per the U.S. Department of Commerce (International Trade Administration), the commercial invoice should be as descriptive as possible. Japan Customs uses the invoice description as a primary basis for tariff classification. A detailed description — "high-strength structural adhesive film, modified epoxy/polyimide composite, 0.1mm thickness, roll width 500mm, HS 3926.90, RoHS compliant" — moves faster through the examination process than a generic product description. All weights and measures must be stated in metric units.

RCEP Preferential Tariff — Reducing Import Duty from Korea

The Regional Comprehensive Economic Partnership (RCEP) agreement entered into force between Japan and Korea in February 2022, per Japan Customs. Under RCEP, Korean exporters can access preferential tariff rates below Japan's MFN rates when goods meet RCEP rules of origin.

Japan's average MFN tariff rate for chemicals is 2.3%, per the U.S. Department of Commerce. The exact preferential RCEP rate for HS code 3926.90 can be confirmed by the Japanese importer's customs broker in Japan's January 2026 tariff schedule. Including a certificate of origin in your export documentation package ensures your Japanese importer can apply any available preferential rate.

Per Korea Customs Service, Korean exporters have two options for proving Korean origin under RCEP:

• Authority-issued Certificate of Origin from Korea Customs or the Korea Chamber of Commerce and Industry (KCCI) — valid for one year from the date of issuance.
• Self-issued Declaration of Origin — available to registered approved exporters, also valid for one year.

The KCCI Certificate of Origin is the standard route for most Korean exporters. Apply at least 3–5 business days before your export departure date. The certificate must accompany the full customs document package when your Japanese importer files the import declaration with Japan Customs.

Ready to Export Your Adhesive Film to the Japan Market?

Successful Japan market entry for high-strength structural adhesive film requires three preparation tracks to run in parallel: coordinate with your Japanese importer on CSCL article status and substance classification; prepare a Japanese-language SDS in JIS Z 7253:2019 format before the first shipment; and assemble a complete customs document package that includes a RCEP certificate of origin from KCCI.

Japan's adhesives and sealants market was valued at USD 4.3 billion in 2025 and is projected to reach USD 6.1 billion by 2034, per IMARC Group, driven by demand from automotive, electronics, and construction sectors. The documentation steps above are the foundation for entering that market reliably and at the lowest available duty rate.

We help Korean industrial material exporters prepare Japan-compliant documentation packages, connect with qualified Japanese importer partners, and coordinate customs clearance from the Korean factory to Japan customs release.

Frequently Asked Questions